As cities develop, automobile exhaust becomes a major source of air pollution, producing large quantities of pollutants such as carbon dioxide and sulfur dioxide. Under increasingly stringent national environmental protection requirements, the automotive industry is seeking breakthroughs in new energy technologies.
Currently, the development of new energy vehicles is primarily driven by batteries as the primary energy source. Battery assemblies are the core components of new energy vehicles. Only by ensuring the safety of the power battery can the vehicle operate safely. This places even stricter demands on the use of adhesives during power battery assembly to ensure safety and durability.
In recent years, with the rapid growth of downstream industry demand, power battery adhesive technology has been mastered by a handful of domestic companies, and a trend toward domestic substitution is gradually emerging. We have accumulated considerable technical expertise and applications in battery management systems (BMSs) and similar new energy storage battery management modules, addressing diverse scenarios such as protection, thermal conductivity, and bonding. This helps batteries cope with increasingly complex operating environments and meet high performance and reliability requirements.
The power battery is the "heart" of new energy vehicles, and adhesives are the "muscle membrane" that enables this "heart" to last. Among the batteries used in new energy vehicles, lithium batteries are crucial to the development and widespread adoption of new energy vehicles.
New energy vehicle power batteries primarily come in three types: prismatic, soft-pack, and cylindrical. A battery system requires a large number of materials to form battery cells, each with its own unique requirements. These materials can be broadly categorized into structural adhesives, thermally conductive materials, insulating materials, heat-insulating materials, and sealing materials.
Structural adhesives: These are primarily used to bond battery cells to each other, between cells and foam, and between cells and module housings. Their primary function is to integrate the cell and module, ensuring resistance to vibration, shock, and drops.
Thermal conductive materials: These are primarily used to conduct heat from the cell and transfer heat away from the module.
Insulating materials: These materials often integrate requirements with other materials. Their primary purpose is to prevent leakage or other damage to individual cells, which could cause short circuits or insulation issues within the battery.
Thermal insulating materials: Their primary function is to isolate external heat from entering the battery system. There are two types of insulating materials: cold and hot.
Sealing materials primarily meet the sealing requirements of battery systems and achieve IP67 ratings.
Thermal conductive adhesives can be mixed in two components and fully cured. They effectively enhance the moisture, corrosion, insulation, and vibration resistance of power battery assemblies, components, and circuit boards, protecting them from environmental damage and damage, while ensuring repairability. Their high and low temperature resistance, stress relief, material strength, and flame retardancy ensure long-term component reliability. They are suitable for thermal conductivity and heat dissipation potting in applications such as new energy power batteries, solar cells, LED driver modules, electronic modules, power supplies, sensors, and transformers.
Adhesive sealants are single-component silicone sealants designed specifically for power battery structures, solar photovoltaic (PV) panel frames, FDS holes, and junction boxes. They bond to a variety of substrates without a primer and offer excellent resistance to high and low temperatures, weather, ozone, and chemical attack. They are also suitable for bonding and sealing telecommunications cabinets and white goods.
In the field of new energy vehicles, the products are mainly used in power battery BMS battery management systems and similar new energy energy storage battery modules for protection, thermal conductivity, bonding and fixation, and other diverse scenarios; the products are used in the thermal management system of battery PACKs to perform heat conduction, encapsulation, and protection; the products are used in electric drives and OBC (on-board charger) system inverters to meet the thermal conductivity and protection needs of power devices.